Probability with Coloured Counters

Sophie has 2 jars filled with marbles. Jar X contains 6 red, 3 blue, and 7 yellow marbles. Jar Y contains 4 red, 5 blue, and 9 yellow marbles. In which jar would you have a better chance of selecting a blue marble? Justify your answer by calculation.

• Jar X

• Jar Y

Tom has 2 boxes of chocolates. Box 1 contains 10 milk chocolates, 5 dark chocolates, and 8 white chocolates. Box 2 contains 7 milk chocolates, 9 dark chocolates, and 6 white chocolates. In which box would you have a better chance of selecting a dark chocolate? Justify your answer by calculation.

• Box 1

• Box 2

Emma has 2 baskets of fruit. Basket A contains 4 apples, 6 bananas, and 3 oranges. Basket B contains 5 apples, 4 bananas, and 7 oranges. In which basket would you have a better chance of selecting an apple? Justify your answer by calculation.

• Basket A

• Basket B

Liam has 2 bags of sweets. Bag 1 contains 12 gummy bears, 8 jelly beans, and 10 lollipops. Bag 2 contains 9 gummy bears, 11 jelly beans, and 7 lollipops. In which bag would you have a better chance of selecting a jelly bean? Justify your answer by calculation.

• Bag 1

• Bag 2

Olivia has 2 jars of buttons. Jar A contains 15 red buttons, 10 blue buttons, and 5 green buttons. Jar B contains 10 red buttons, 12 blue buttons, and 8 green buttons. In which jar would you have a better chance of selecting a green button? Justify your answer by calculation.

• Jar A

• Jar B

Noah has 2 containers of coins. Container 1 contains 20 pennies, 15 nickels, and 10 dimes. Container 2 contains 18 pennies, 12 nickels, and 15 dimes. In which container would you have a better chance of selecting a dime? Justify your answer by calculation.

• Container 1

• Container 2

Ava has 2 boxes of crayons. Box A contains 8 red crayons, 6 blue crayons, and 10 green crayons. Box B contains 7 red crayons, 9 blue crayons, and 8 green crayons. In which box would you have a better chance of selecting a blue crayon? Justify your answer by calculation.

• Box A

• Box B

James has 2 bags of marbles. Bag 1 contains 5 red marbles, 7 blue marbles, and 8 yellow marbles. Bag 2 contains 6 red marbles, 5 blue marbles, and 9 yellow marbles. In which bag would you have a better chance of selecting a yellow marble? Justify your answer by calculation.

• Bag 1

• Bag 2

Isabella has 2 jars of sweets. Jar A contains 9 chocolate sweets, 6 strawberry sweets, and 5 mint sweets. Jar B contains 8 chocolate sweets, 7 strawberry sweets, and 6 mint sweets. In which jar would you have a better chance of selecting a mint sweet? Justify your answer by calculation.

• Jar A

• Jar B

Lucas has 2 baskets of toys. Basket 1 contains 10 cars, 8 dolls, and 12 balls. Basket 2 contains 9 cars, 11 dolls, and 10 balls. In which basket would you have a better chance of selecting a doll? Justify your answer by calculation.

• Basket 1

• Basket 2